Thomas: Just about the same time as your message, I was reading about it in an online document and it said: ..... "The store() function has a similar interface; the additional size parameter gives the length of the data received from user space. Never forget that buffer contains unchecked, user-supplied data; treat it carefully and be sure that it fits whatever format you require. The return value should normally be the same as size, unless something has gone wrong" ..... So I returned the size parameter and it worked. Thanks for your help. Suri > -----Original Message----- > From: kernelnewbies-bounce@xxxxxxxxxxxx [mailto:kernelnewbies- > bounce@xxxxxxxxxxxx] On Behalf Of Thomas Petazzoni > Sent: Friday, February 03, 2006 11:22 AM > To: kernelnewbies@xxxxxxxxxxxx > Subject: Re: device class related > > Hi, > > Suresh Shelvapille a écrit : > > > it appears as though the store_portstate function is getting called in > an > > infinite loop! > > > > What causes this? > > I'm not an expert of the device infrastructure of the Linux kernel, but > I suspect it's because you don't return the number of bytes that you > have taken into account. > > The store() method has the following prototype: > > ssize_t (*store)(struct class_device *, const char * buf, size_t count); > > So you must return the number of bytes that have been written. > > Sincerly, > > Thomas > -- > Thomas Petazzoni > thomas.petazzoni@xxxxxxxx > > > -- > Kernelnewbies: Help each other learn about the Linux kernel. > Archive: http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
